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Rapid formation of the high-T c phase in (Bi,Pb)-Sr-Ca-Cu-O superconductor via the sol-gel method

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Abstract

Bi-Pb-Sr-Ca-Cu-O powder was synthesized by the oxalate gel method. A sample with the composition of Bi1.7Pb0.4Sr1.6Ca2.4Cu3.6Oy was used in this study. After pyrolysis of the gel precursor at 500 °C for 5 h, the resulting powder was calcined at 850 °C for another 5 h. The black powder was pressed into pellets and sintered at 852 °C for 5 h. The high-T c phase was formed more easily in the sample with excess calcium and copper than in the theoretical composition. (Bi,Pb)2Sr2Ca2Cu3Oy (above 90%) was prepared as above within a relatively short time. Characterization of (Bi,Pb)2Sr2Ca2Cu3Oy superconductor by X-ray diffraction, scanning electron microscopy, electron probe microanalysis, resistivity measurement and magnetic measurement, is reported.

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Authors and Affiliations

  1. Department of Chemistry, National Tsing Hua University, 30043, Hsinchu, Taiwan

    S. R. Sheen, D. H. Chen & C. T. Chang

  2. Department of Materials Science Center, National Tsing Hua University, 30043, Hsinchu, Taiwan

    C. H. Kao, J. C. Huang, Y. C. Chou, Y. C. Hsieh, Y. H. Hsieh & M. K. Wu

  3. Department of Chemistry, Soochow University, Taipei, Taiwan

    H. S. W. Chang

  4. Materials Science Centre, National Tsing Hua University, 30043, Hsinchu, Taiwan

    S. R. Sheen

Authors
  1. S. R. Sheen
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  2. D. H. Chen
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  3. C. T. Chang
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  4. C. H. Kao
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  5. J. C. Huang
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  6. Y. C. Chou
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  7. Y. C. Hsieh
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  8. Y. H. Hsieh
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  9. M. K. Wu
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  10. H. S. W. Chang
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Sheen, S.R., Chen, D.H., Chang, C.T. et al. Rapid formation of the high-T c phase in (Bi,Pb)-Sr-Ca-Cu-O superconductor via the sol-gel method. JOURNAL OF MATERIALS SCIENCE 30, 1827–1831 (1995). https://doi.org/10.1007/BF00351617

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  • DOI: https://doi.org/10.1007/BF00351617

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